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| author | Bruno Haible <bruno@clisp.org> | 2008-12-09 12:59:08 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2008-12-09 12:59:08 +0100 |
| commit | 55f15d88ddd9754f4da0d2621e18f3ad378e2dce (patch) | |
| tree | f4e82ba350a5d0ca0fd0946c4b799dd94400f2b6 /m4/ldexpl.m4 | |
| parent | 9c3361f53f3773ce52a881f26c8f3325478badd8 (diff) | |
| download | gnulib-55f15d88ddd9754f4da0d2621e18f3ad378e2dce.tar.gz | |
Detect that ldexpl does not work on MacOS X 10.4/PowerPC.
Diffstat (limited to 'm4/ldexpl.m4')
| -rw-r--r-- | m4/ldexpl.m4 | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/m4/ldexpl.m4 b/m4/ldexpl.m4 index 804f1b8ad7..9a9d383e4a 100644 --- a/m4/ldexpl.m4 +++ b/m4/ldexpl.m4 @@ -1,5 +1,5 @@ -# ldexpl.m4 serial 2 -dnl Copyright (C) 2007 Free Software Foundation, Inc. +# ldexpl.m4 serial 3 +dnl Copyright (C) 2007-2008 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -60,7 +60,8 @@ AC_DEFUN([gl_FUNC_LDEXPL], AC_SUBST([LDEXPL_LIBM]) ]) -dnl Test whether ldexpl() works on finite numbers (this fails on AIX 5.1). +dnl Test whether ldexpl() works on finite numbers (this fails on AIX 5.1 +dnl and MacOS X 10.4/PowerPC). AC_DEFUN([gl_FUNC_LDEXPL_WORKS], [ AC_REQUIRE([AC_PROG_CC]) @@ -72,9 +73,11 @@ AC_DEFUN([gl_FUNC_LDEXPL_WORKS], extern long double ldexpl (long double, int); int main() { - volatile long double x = 1.0; - volatile long double y = ldexpl (x, -1); - return (y != 0.5L); + volatile long double x1 = 1.0; + volatile long double y1 = ldexpl (x1, -1); + volatile long double x2 = 1.73205L; + volatile long double y2 = ldexpl (x2, 0); + return (y1 != 0.5L) || (y2 != x2); }], [gl_cv_func_ldexpl_works=yes], [gl_cv_func_ldexpl_works=no], [case "$host_os" in aix*) gl_cv_func_ldexpl_works="guessing no";; |